Roller side bearing.



A. STUOKI. ROLLER SIDE BEARING.

APPLICATION FILED P111314, 1912.

Patented Dec. 23, 1913.

resident of Pittsburgh, in the ll'hlll'lillfi l l PATENT BEIGE.

ROLLER SIDE BEARING.

specification of Letters Eatent.

' Patented Doc. 23, it

Application filed February M, 1912. Serial No. 67?,530.

To all whom it r/ioy concern:

Be it known that I, AaNoLD S'rconr, a county oil Allegheny and State ofl-ennsylvania, have invented a new and useful. Improvement in RollerSide Bearings, oi which the following is a specification.

This invention relates to roller side hearings for railway trucks, andis particularly adapted to those forms of railway trucks in which thecar body is supported solely on the side hearings, such as one form ofstreet railway trucks now in use.

The object of the invention is'to provide a side hearing for thecharacter of trucks stated which completely overcomes the tremendousfriction which occurs when the car passes around curves.

bearing; Fig. 3 is in part a side elevation and in part a verticalcentral longitudinal section thereof; and Fig. 4 is a central transversesection on the line %4, Fig. 3.

A portion of the side frame of the truck at 1. This may he of anysuitable is shown or tles"'ccl type. Mounted in the side 1h slit "vertially therein are a pair of p 2 and 3 whit. l normally are held projectonmvardly lay means of the helical spring; 4: surromading the same. Thetops of the posts are rounded and fit into pockets 5 in a cap (2 the capbeing held in place on the Y. Tl a type of motor I derahle nim'ilien; ondil t 1 various one; of the ales the cap on top oi the spring; post asolid. casting; provided with wearing shoes whichcan he removed, Tlhecar hotly reststlirectly upon these caps secured to the bottom of thehousing:

and is entirely saoported thereby. 'lthese solid eaps slide upon and areguided by 'iaped angle guide members secured to tl a bottom. of the carbody. The J s it guides located a. long distance in the center ofoscillation, and the friction be tween the caps and guides, working onsuch a long arm, is tremendous, so that it quires great force to swivelthe truck under the car. This force transmitted to the wheel flanges andrail head, producing a grinding action which. quickly wears both to suchan extent that the power wasted. in swiveling the truck on curves isprobably the least item of loss. The difficulty of swiveling the truckalso tends to derailment of the can With my invention the cap 5 is soc0nstrueted to provide a. housing for a freely traveling rolle As shownin the drawings, the cap and housing are a. single integral casting, butthe number of parts and :lhe character of material from which the sameis made is not of the essence of the invention. As shown, the housinghas the upwardly projecting side walls 8 and end walls 9 formingsubstantially a box. The bottom of the housing is provided on each sidewith runways 10 and intermediate the same with a depressed portion 11.Preferably the run-- ways'are forn'iod of hardened steel plates ycountersunk rivets 13 Or other suitable lastening means. In the housingis a freely traveling roller comprising the large central portion 15adapted to have the car body rest directly thereupon and sumo-oilingsaid car body, and the reduced end portions which freely roll on therunways l0. central depressed portion 11 of such de that the largerportion 15 or" the roller d not contact therewith. The car body onbottom carries a suitable hearing plate member 17 resting upon theroller 15.

lh'e'i'eiahly the housing .1d the rune". 10 are of are shape struck cmthe the .l center oi? we tion or swiveling oi t uch under this body, andthe roller and its reduced on portions 16 are all. conical, the lines ofthese cones converging at the theoretical center of (i of attachment ofthe posts 2 and 3, as appath.

oscillation of the truck. One of the runways 10 is higher than theother, and both runways are inclined laterally to such a degree that theupper longitudinal surface of the roller 15 is horizontal, as shown inFig. 3. As a consequence, the roller tends to run in an are shaped pathand therefore [guides the swiveling motion of the truck so that thebearing plates 17 could be ordinary fiat plates, were it not forabnormal and accidental heavy lateral forces induced by abnormal railand speed conditions. Even if of angleashape the side bearings do notnormally bear against the depending flange, thereby removing absolutelythis element of friction so pronounced with the old solid spring caps.This is due to the tendency ofthe'rollers naturally to run in an areshaped curve conforming to the are of the member 17 so that if, thehousing is forced against \the depending flange, it has a long bearingthereagainst.

The particular form of rollers, that is, with an enlarged part to carrythe car body and with parts of smaller diameter for running on therunway, is particularly adapted to the form of truck in which thedistance between the spring posts 2 and 3 is limited, as it is notadvisable to have theroller roll directly over either spring post, ortoo closely thereto, which would'have a tendency for the other springpost to fly up and throw the bearing out of level. The reduced endportions 16 of the rollers give to the latter a very considerable numberof revolutions without bringing them too close over thespring post,while the enlarged central portion 15 allows of a longer travel of thecar body, due to its greater diameter, thereby giving the large travelrequired in order to permit of a largeangular variationof the truckunder the car body, such ,as is' Any dirt or water getting intotheho-us- 1 ing escapes through the central opening 1 or through sideopenings 20 which are formed by cuttingaway a part. of the bottom toprovide spaces for the heads of the rivets 13. 1

The are shaped runway is not' symmetrical relative to the lineconnecting the points pears clearly in Fig. 2. This is due to the factthat with this type of truck, the theoretlcal center of oscillation issome distance The outer wall of the housing is on afrom a, straight-line connecting the two side bearings or supports. The housingdescribed forms the cap for the spring posts 1 and 2 as well as formingthe runway for the roller 15. It is designed to fit existing trucks ofthe type described having spring posts to which are connected capsforming the sole support for the car body, the car having no centerbearing. This side bearing is absolutely frictionless, as the roller isfree to travel back and forth in the housing. Said roller cannot becomedisplaced because the load is always resting thereupon. The roller alsoserves to guide the truck in its swiveling movement, as there is noslipping or sliding necessary between the car body and the roller or theroller and the bearing,

due to the tendency of the roller to always travel in an are shapedpath. It therefore eliminates the friction of the old form of solidbearing caps for the spring posts, the grinding and wear due to suchsliding movements, the waste of power, the grinding and wear of thewheel flanges and rails and the liability of derailment of the old formof spring caps.

What I claim is:

1. The combination with a truck frame, of spring posts mounted therein,a cap mounted on said spring posts and arranged to form runways havingportions at different heights and provided with end walls forming stops,and a rolter having two diameters, the smaller diameter arranged to rollon said runways and the larger diameten arranged to have the car bodyrest thereupon and to contact said end walls at the limits of movementof said roller in both directions.

2. The combination with a truck frame, of

spring posts mounted therein, a cap for said duced end portions rollingon said runways,

said roller resting loosely upon said runways and being removable fromthe open top of said cap when the car body is removed thcrefrom.

3,- The combination with a truck frame, of spring posts mounted therein,a cap mounted on said spring posts and providing arc shaped runways, anda conical roller arranged to travel on said runways and adapted to havethe'car body rest thereupon and forming a guide and a support for thecar body, said'runways being inclined laterally to a degree that theupper longitudinal surface of the roller is horizontal.

l. A truck side bearing comprising a housing having its bottom forming"an are In testimbny whereof, I have hereunto set shaped runwayl, end 3,conical I'Ollfig ar- 'my hand. ran ed to brave on sai runwa and a apt- Ied l have the car body rest the reupon, said ARNOLD STUCKI 5 runwaybeing inclined laterally to a degree Witnesses:

that the upper longitudinal surface of the F. W. WINTER, roller ishorizontal. MARY E. CAHOON.

